The MTX-Tunnel application with Java software uses SMS to access the MTX-65i modem, or to activate relays from the MTX-IND modem.

The MTX-Tunnel application with Java software uses SMS messaging to change a digital output value in MTX-65i or switch a relay in our MTX-IND terminal modem. SMS to RS232 or SMS to I2C tunneling gateway can be used to command or read data from an external device such as a display.

Relay control by SMS message and MTX-Tunnel access by Web Browser

Scenario details

It is necessary to control four relays by SMS; for example, to enable or disable some streetlights in a remote location

An SMS with the text ONx or OFFx (where x is 1, 2, 3 or 4) is sent so that the relays of every streetlight are either enabled or disabled. In order to do this, it is necessary to create an ALIAS text string in the modem.

Only the 100 phone numbers allowed by the company should be able to send an SMS, starting with 6662746XX

We want to access the relays and also activate the WEBSERVER on the MTX-Tunnel via SMS (sending SMS with an “on” string or using a missed call). WebServer is only activated for 10 minute periods, which are long enough to perform maintenance tasks such as access to relays from a PC browser or changes to any of the other MTX-Tunnel configuration settings.

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